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KMID : 1059520190630020078
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Journal of the Korean Chemical Society
2019 Volume.63 No. 2 p.78 ~ p.84
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High-resolution 1H NMR Spectroscopy of Green and Black Teas
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Jeong Ji-Ho
Jang Hyun-Jun
Kim Yong-Ae
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Abstract
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High-resolution 1H NMR spectroscopic technique has been widely used as one of the most powerful analytical tools in food chemistry as well as to define molecular structure. The 1H NMR spectra-based metabolomics has focused on classification and chemometric analysis of complex mixtures. The principal component analysis (PCA), an unsupervised clustering method and used to reduce the dimensionality of multivariate data, facilitates direct peak quantitation and pattern recognition. Using a combination of these techniques, the various green teas and black teas brewed were investigated via metabolite profiling. These teas were characterized based on the leaf size and country of cultivation, respectively.
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KEYWORD
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Multivariate analysis, 1H NMR, Green tea, Black tea, Classification
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